Below are some technical papers that will hopefully contribute some knowledge and algorithms to the DSP community in general.
Dynamic Smoothing
DynamicSmoothing.pdf - Two Pole State Variable Filter with self adjusting cutoff to musically smooth low bit depth and/or noisey control signals
Linear trapezoidal integrated filters
OnePoleLinearLowPass.pdf - One Pole Low Pass Filter
SvfLinearTrapOptimised2.pdf - State Variable Filter
SkfLinearTrapOptimised2.pdf - Sallen Key Low Pass Filter
SVF-vs-DF1.pdf - Noise performance plots
Sin only coefficient computation in state increment form for low noise and high accuracy
SvfLinearTrapezoidalSin.pdf - State Variable Filter with Sin only coefficient calculation
SkfLinearTrapezoidalSin.pdf - Sallen Key Filter with Sin only coefficient calculation
Input mixing multimode filters - individual inputs for low, band, and high
SvfInputMixing.pdf - State Variable Filter with Input mixing for low, band, and high
SkfInputMixing.pdf - Sallen Key Filter with Input mixing for low, band, and high
Matching of Forward Euler SVF to Trapezoidal SVF
SvfMatchingFeToTr.pdf